On the night of the bombing of the camp, Shen Zhao led 300 remaining cavalry to break through the enemy formation and rescue the crown prince, but was vilified by the court as a false edict. Su Yan secretly delivered the ironclad evidence of collusion with the enemy as a document, Zhao Lie secretly mobilized troops to exonerate him, and Liu Hanyan's secret medicine rekindled the fighting spirit of the defeated army. When the emperor issued an order to kill the old troops of the border army, Shen Zhao realized that he was an abandoned pawn. He tore his official robe to pieces, burned the military flag as an order, and vowed to trample the decaying mountains and rivers with his lone horse. As for Su Yan's life experience, Chen Henian's secret letter, and Aguda's contract, every game is a bet of blood and fire.
Shen Zhao was awarded the title of General Protecting the Country for rescuing his cavalry alone. However, he was framed by Chen Henian, the Minister of War, the border troops were purged, and Su Yan's secret letter was destroyed. In order to protect the old army, Zhao Lie risked his life to hand over the soldiers to help Shen Zhao escape to Mobei, but he was demoted to a garrison soldier. Shen Zhao consolidated the defeated troops and formed an alliance with Di Rong Aguda, and used military garrison system to rebuild combat power. Su Yan used his identity as an imperial doctor to forge an imperial edict to mobilize troops, and Liu Hanyan used poison to counteract the enemy's plague, gradually disintegrating Chen Henian's supply chain. Chen Henian discovered that Su Yan was the princess of the former dynasty and wanted to use her to lure the snake out of the hole, but he did not know that she had already hidden the evidence in the Beidi Mission. When Dayan's three-pronged army encircled Shen Zhao, A Gu defeated Ge to help the battle and exposed the evidence that Chen Henian had an affair with Beidi, which shocked the imperial power. Shen Zhao did not want to take the throne, but only wanted to abolish the hereditary system of military registration. Su Yan disclosed his identity and was willing to die for his country in exchange for new military laws. The emperor finally burned the imperial edict, and Shen Zhao led the remaining troops to conquer the barbarians in the west, leaving behind the military song "The lonely horse is not destroyed, the soul of the country is not destroyed". In the dark, Liu Hanyan's prescription was intercepted by a mysterious person, and Zhao Lie dug out the iron plate with the dragon pattern of the previous dynasty in the ruins of the border town - a new storm is brewing.
